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CONTROL EXECUTION of PROGRAMS
FUNCTIONS:
EXEC(program);
Sets up memory, loads program, turns
control to program.
SUSPEND(program);
Suspends execution of program,saves registers
and waits.
CONTINUE(program);
Restores registers and continues running
the program.
DESTORY(program);
Stop execution of program, take care of any
data storage and return memory to pool.
MEMORY MANAGEMENT
FUNCTIONS:
GETMEMORYAMOUNT();
Determine the amount of memory in the system.
SETMEMORYBLOCK();
Setup memory blocks.
First block 64k system
Second block 128k program
Third block 128k program
Fourth block 128k program
Fifth block 128k program
Sixth block 64k system
Due to DSP's need for speed, programs will
most likely be written in Assembler or C. So
128k should be enough room for a nice DSP program.
Services might include a way to join 2 blocks for
larger programs.
SETMEMORYREGISTERS();
Set the extra registers.
FS = 0xB8000 Video memory text mode
GS =
Ramdisk and DMA dump
CHECKFREEBLOCK();
Check the block table to see if a block is free.
SETDMA();
Setup DMA for moves from the sound card to memory.
FILE SYSTEM MANAGEMENT
FUNCTIONS:
READFILE();
Read a file into memory
WRITEFILE();
Write a file from memory to disk
CREATEFILE();
Create a file and return a handle
OPENFILE();
Open a file and return a handle
CLOSEFILE();
Close a file and return status
CREATERAMDISK();
Create a ramdisk for program storage.
1 meg, simple 64k block directory.
File may span more than one block.
Some blocks may be split smaller for
small utility programs.
COPYFLOPPY();
Copy the contents of the floppy to
the ramdisk.
COPYVOLITAL();
Copy saved files back to the floppy.
Could be hooked to an interrupt to
save at a pre set interval. Files will
be written back on system start up.
Certain blocks in the ramdisk would have
to be set aside for saved files only.
PERIPLEAL DEVICE MANAGEMENT
MONITOR
FUNCTIONS:
INT 0X22
KEYBOARD
MOUSE
FLOPPY
HARDDISK
SOUND CARD
PRINTER PORT
SERIAL PORT
DSP MANAGEMENT
FUNCTIONS:
DETECTSOUNDCARD();
Detect the sound card. And make sure it
will operate like a Sound Blaster 16.
SETSOUNDCARD();
Setup the sound card for sample rate.
SET_SOUND_CARD_DMA();
Setup the sound card for a DMA move to
memory.
SET_DSP_BUFFER();
Setup the buffer for the DSP.
TASK SCHEDULING MANAGEMENT
FUNCTIONS:
SET_TASK_SCHEDULING();
Setup one of the following scheduling
if needed.
PRE-EMPTIVE Foreground process
gets
the most time.
TIME SLICED Each process gets a slice
of time set by the user.
ROUND-ROBION Each process gets the same
amount of time.
INTERRUPT MANAGEMENT
FUNCTIONS:
See INT.HTM
TIMER MANAGEMENT
FUNCTIONS:
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